./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef17cfb4a2c8358ea255253edc0610051a64c94a86cd92ff89d3b074c51925f6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:59:46,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:59:46,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:59:46,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:59:46,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:59:46,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:59:46,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:59:46,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:59:46,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:59:46,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:59:46,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:59:46,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:59:46,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:59:46,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:59:46,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:59:46,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:59:46,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:59:46,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:59:46,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:59:46,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:59:46,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:59:46,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:59:46,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:59:46,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:59:46,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:59:46,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:59:46,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:59:46,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:59:46,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:59:46,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:59:46,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:59:46,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:59:46,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:59:46,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:59:46,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:59:46,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:59:46,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:59:46,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:59:46,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:59:46,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:59:46,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:59:46,728 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:59:46,772 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:59:46,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:59:46,774 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:59:46,774 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:59:46,774 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:59:46,775 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:59:46,775 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:59:46,775 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:59:46,781 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:59:46,782 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:59:46,783 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:59:46,783 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:59:46,783 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:59:46,784 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:59:46,784 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:59:46,784 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:59:46,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:59:46,785 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:59:46,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:59:46,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:59:46,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:59:46,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:59:46,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:59:46,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:59:46,787 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:59:46,787 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:59:46,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:59:46,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:59:46,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:59:46,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:59:46,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:59:46,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:46,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:59:46,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:59:46,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:59:46,789 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:59:46,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:59:46,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:59:46,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:59:46,790 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:59:46,790 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef17cfb4a2c8358ea255253edc0610051a64c94a86cd92ff89d3b074c51925f6 [2021-11-19 13:59:47,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:59:47,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:59:47,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:59:47,070 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:59:47,071 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:59:47,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c [2021-11-19 13:59:47,133 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/data/d69d2af92/5544ac9914db475cb37571cebd3762e5/FLAG2ae64f02b [2021-11-19 13:59:47,817 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:59:47,823 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c [2021-11-19 13:59:47,850 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/data/d69d2af92/5544ac9914db475cb37571cebd3762e5/FLAG2ae64f02b [2021-11-19 13:59:47,989 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/data/d69d2af92/5544ac9914db475cb37571cebd3762e5 [2021-11-19 13:59:47,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:59:47,993 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:59:48,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:48,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:59:48,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:59:48,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:47" (1/1) ... [2021-11-19 13:59:48,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eec6472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:48, skipping insertion in model container [2021-11-19 13:59:48,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:47" (1/1) ... [2021-11-19 13:59:48,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:59:48,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:48,310 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c[1811,1824] [2021-11-19 13:59:48,791 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:48,809 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:59:48,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9329f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:48, skipping insertion in model container [2021-11-19 13:59:48,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:48,810 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:59:48,813 INFO L158 Benchmark]: Toolchain (without parser) took 818.26ms. Allocated memory is still 102.8MB. Free memory was 57.5MB in the beginning and 61.3MB in the end (delta: -3.8MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2021-11-19 13:59:48,814 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 102.8MB. Free memory is still 77.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:59:48,815 INFO L158 Benchmark]: CACSL2BoogieTranslator took 808.72ms. Allocated memory is still 102.8MB. Free memory was 57.3MB in the beginning and 61.3MB in the end (delta: -4.0MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2021-11-19 13:59:48,818 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 102.8MB. Free memory is still 77.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 808.72ms. Allocated memory is still 102.8MB. Free memory was 57.3MB in the beginning and 61.3MB in the end (delta: -4.0MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2371]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef17cfb4a2c8358ea255253edc0610051a64c94a86cd92ff89d3b074c51925f6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:59:51,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:59:51,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:59:51,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:59:51,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:59:51,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:59:51,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:59:51,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:59:51,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:59:51,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:59:51,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:59:51,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:59:51,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:59:51,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:59:51,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:59:51,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:59:51,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:59:51,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:59:51,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:59:51,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:59:51,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:59:51,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:59:51,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:59:51,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:59:51,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:59:51,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:59:51,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:59:51,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:59:51,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:59:51,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:59:51,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:59:51,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:59:51,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:59:51,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:59:51,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:59:51,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:59:51,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:59:51,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:59:51,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:59:51,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:59:51,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:59:51,388 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:59:51,441 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:59:51,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:59:51,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:59:51,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:59:51,443 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:59:51,443 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:59:51,443 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:59:51,444 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:59:51,444 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:59:51,444 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:59:51,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:59:51,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:59:51,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:59:51,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:59:51,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:59:51,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:59:51,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:59:51,449 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:59:51,449 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:59:51,449 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:59:51,449 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:59:51,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:59:51,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:59:51,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:59:51,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:59:51,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:59:51,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:59:51,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:51,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:59:51,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:59:51,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:59:51,452 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:59:51,452 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:59:51,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:59:51,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:59:51,453 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:59:51,453 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef17cfb4a2c8358ea255253edc0610051a64c94a86cd92ff89d3b074c51925f6 [2021-11-19 13:59:51,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:59:51,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:59:51,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:59:51,880 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:59:51,881 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:59:51,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c [2021-11-19 13:59:51,975 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/data/a0f908a0c/e948228ceae6499395d60b3954aff761/FLAG81f7c3cdd [2021-11-19 13:59:52,829 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:59:52,830 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c [2021-11-19 13:59:52,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/data/a0f908a0c/e948228ceae6499395d60b3954aff761/FLAG81f7c3cdd [2021-11-19 13:59:52,932 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/data/a0f908a0c/e948228ceae6499395d60b3954aff761 [2021-11-19 13:59:52,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:59:52,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:59:52,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:52,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:59:52,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:59:52,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:52" (1/1) ... [2021-11-19 13:59:52,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aab9c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:52, skipping insertion in model container [2021-11-19 13:59:52,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:52" (1/1) ... [2021-11-19 13:59:52,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:59:53,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:53,274 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c[1811,1824] [2021-11-19 13:59:53,583 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:53,597 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:59:53,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:53,624 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c[1811,1824] [2021-11-19 13:59:53,761 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:53,784 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:59:53,801 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c[1811,1824] [2021-11-19 13:59:53,963 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:54,007 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:59:54,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:54 WrapperNode [2021-11-19 13:59:54,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:54,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:59:54,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:59:54,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:59:54,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:54" (1/1) ... [2021-11-19 13:59:54,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:54" (1/1) ... [2021-11-19 13:59:54,167 INFO L137 Inliner]: procedures = 96, calls = 346, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 815 [2021-11-19 13:59:54,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:59:54,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:59:54,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:59:54,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:59:54,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:54" (1/1) ... [2021-11-19 13:59:54,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:54" (1/1) ... [2021-11-19 13:59:54,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:54" (1/1) ... [2021-11-19 13:59:54,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:54" (1/1) ... [2021-11-19 13:59:54,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:54" (1/1) ... [2021-11-19 13:59:54,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:54" (1/1) ... [2021-11-19 13:59:54,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:54" (1/1) ... [2021-11-19 13:59:54,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:59:54,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:59:54,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:59:54,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:59:54,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:54" (1/1) ... [2021-11-19 13:59:54,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:54,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:59:54,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:59:54,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:59:54,450 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 13:59:54,451 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 13:59:54,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:59:54,452 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 13:59:54,452 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 13:59:54,452 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 13:59:54,452 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 13:59:54,452 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:59:54,452 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:59:54,453 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-19 13:59:54,453 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-19 13:59:54,453 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:59:54,453 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:59:54,453 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 13:59:54,454 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 13:59:54,454 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:59:54,454 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:59:54,454 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 13:59:54,454 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 13:59:54,455 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:59:54,455 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:59:54,455 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:59:54,455 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:59:54,455 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:59:54,455 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:59:54,456 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:59:54,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:59:54,456 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:59:54,456 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:59:54,456 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:59:54,457 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:59:54,457 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:59:54,457 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:59:54,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:59:54,458 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 13:59:54,458 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 13:59:54,459 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:59:54,459 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:59:54,459 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:59:54,459 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:59:54,459 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:59:54,460 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:59:54,460 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:59:54,460 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:59:54,460 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:59:54,460 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:59:54,461 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 13:59:54,461 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 13:59:54,462 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:59:54,463 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:59:54,464 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:59:54,465 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:59:54,465 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:59:54,465 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:59:54,465 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 13:59:54,466 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 13:59:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:59:54,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:59:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:59:54,467 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:59:54,728 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:59:54,731 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:59:56,306 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:59:56,328 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:59:56,328 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 13:59:56,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:59:56 BoogieIcfgContainer [2021-11-19 13:59:56,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:59:56,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:59:56,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:59:56,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:59:56,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:59:52" (1/3) ... [2021-11-19 13:59:56,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32be25a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:59:56, skipping insertion in model container [2021-11-19 13:59:56,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:54" (2/3) ... [2021-11-19 13:59:56,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32be25a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:59:56, skipping insertion in model container [2021-11-19 13:59:56,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:59:56" (3/3) ... [2021-11-19 13:59:56,343 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product23.cil.c [2021-11-19 13:59:56,350 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:59:56,350 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:59:56,422 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:59:56,436 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:59:56,436 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:59:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand has 620 states, 482 states have (on average 1.6742738589211619) internal successors, (807), 500 states have internal predecessors, (807), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-19 13:59:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 13:59:56,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:56,538 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:56,538 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:56,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1996371556, now seen corresponding path program 1 times [2021-11-19 13:59:56,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:56,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119324669] [2021-11-19 13:59:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:56,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:56,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:56,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:56,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:59:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:57,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:57,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 13:59:57,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 13:59:57,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:57,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119324669] [2021-11-19 13:59:57,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119324669] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:57,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:57,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:59:57,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039772334] [2021-11-19 13:59:57,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:57,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:57,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:57,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:57,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:57,928 INFO L87 Difference]: Start difference. First operand has 620 states, 482 states have (on average 1.6742738589211619) internal successors, (807), 500 states have internal predecessors, (807), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:59:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:58,134 INFO L93 Difference]: Finished difference Result 1234 states and 2054 transitions. [2021-11-19 13:59:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:59:58,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 131 [2021-11-19 13:59:58,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:58,158 INFO L225 Difference]: With dead ends: 1234 [2021-11-19 13:59:58,158 INFO L226 Difference]: Without dead ends: 614 [2021-11-19 13:59:58,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:59:58,182 INFO L933 BasicCegarLoop]: 996 mSDtfsCounter, 15 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2979 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:58,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2979 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-19 13:59:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-11-19 13:59:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 478 states have (on average 1.6527196652719665) internal successors, (790), 494 states have internal predecessors, (790), 108 states have call successors, (108), 29 states have call predecessors, (108), 27 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 13:59:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1003 transitions. [2021-11-19 13:59:58,313 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1003 transitions. Word has length 131 [2021-11-19 13:59:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:58,313 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1003 transitions. [2021-11-19 13:59:58,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:59:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1003 transitions. [2021-11-19 13:59:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 13:59:58,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:58,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:58,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:58,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:58,547 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:58,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:58,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1920336744, now seen corresponding path program 1 times [2021-11-19 13:59:58,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:58,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239720274] [2021-11-19 13:59:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:58,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:58,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:58,552 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:58,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:59:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:58,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:59:58,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:59:59,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:59:59,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:59,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239720274] [2021-11-19 13:59:59,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239720274] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:59,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:59,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 13:59:59,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705125516] [2021-11-19 13:59:59,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:59,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:59:59,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:59,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:59:59,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:59:59,713 INFO L87 Difference]: Start difference. First operand 614 states and 1003 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:00,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:00,050 INFO L93 Difference]: Finished difference Result 1240 states and 2031 transitions. [2021-11-19 14:00:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:00:00,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 133 [2021-11-19 14:00:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:00,060 INFO L225 Difference]: With dead ends: 1240 [2021-11-19 14:00:00,060 INFO L226 Difference]: Without dead ends: 636 [2021-11-19 14:00:00,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:00:00,067 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 119 mSDsluCounter, 4848 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5839 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:00,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 5839 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:00:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-19 14:00:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 627. [2021-11-19 14:00:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 488 states have (on average 1.6495901639344261) internal successors, (805), 506 states have internal predecessors, (805), 109 states have call successors, (109), 29 states have call predecessors, (109), 29 states have return successors, (111), 104 states have call predecessors, (111), 106 states have call successors, (111) [2021-11-19 14:00:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1025 transitions. [2021-11-19 14:00:00,139 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1025 transitions. Word has length 133 [2021-11-19 14:00:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:00,140 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1025 transitions. [2021-11-19 14:00:00,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1025 transitions. [2021-11-19 14:00:00,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:00:00,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:00,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:00,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:00,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:00,377 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:00,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1020029407, now seen corresponding path program 1 times [2021-11-19 14:00:00,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:00,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55843037] [2021-11-19 14:00:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:00,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:00,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:00,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:00,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:00:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:00,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:00:00,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:00:01,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:00:01,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:01,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55843037] [2021-11-19 14:00:01,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55843037] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:01,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:01,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:00:01,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601659386] [2021-11-19 14:00:01,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:01,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:00:01,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:01,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:00:01,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:00:01,577 INFO L87 Difference]: Start difference. First operand 627 states and 1025 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:01,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:01,961 INFO L93 Difference]: Finished difference Result 1260 states and 2064 transitions. [2021-11-19 14:00:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:00:01,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 134 [2021-11-19 14:00:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:01,968 INFO L225 Difference]: With dead ends: 1260 [2021-11-19 14:00:01,969 INFO L226 Difference]: Without dead ends: 645 [2021-11-19 14:00:01,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:00:01,974 INFO L933 BasicCegarLoop]: 1007 mSDtfsCounter, 105 mSDsluCounter, 4903 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5910 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:01,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5910 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:00:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-11-19 14:00:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 627. [2021-11-19 14:00:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 488 states have (on average 1.6495901639344261) internal successors, (805), 506 states have internal predecessors, (805), 109 states have call successors, (109), 29 states have call predecessors, (109), 29 states have return successors, (111), 104 states have call predecessors, (111), 106 states have call successors, (111) [2021-11-19 14:00:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1025 transitions. [2021-11-19 14:00:02,010 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1025 transitions. Word has length 134 [2021-11-19 14:00:02,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:02,011 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1025 transitions. [2021-11-19 14:00:02,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1025 transitions. [2021-11-19 14:00:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:00:02,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:02,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:02,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:02,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:02,234 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:02,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:02,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1691285707, now seen corresponding path program 1 times [2021-11-19 14:00:02,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:02,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8547378] [2021-11-19 14:00:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:02,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:02,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:02,237 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:02,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:00:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:02,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:02,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:00:02,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:00:03,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:03,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8547378] [2021-11-19 14:00:03,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8547378] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:03,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:03,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:00:03,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503618680] [2021-11-19 14:00:03,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:03,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:03,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:03,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:00:03,336 INFO L87 Difference]: Start difference. First operand 627 states and 1025 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:00:03,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:03,437 INFO L93 Difference]: Finished difference Result 1245 states and 2039 transitions. [2021-11-19 14:00:03,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:00:03,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 134 [2021-11-19 14:00:03,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:03,444 INFO L225 Difference]: With dead ends: 1245 [2021-11-19 14:00:03,444 INFO L226 Difference]: Without dead ends: 628 [2021-11-19 14:00:03,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:03,457 INFO L933 BasicCegarLoop]: 985 mSDtfsCounter, 22 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2946 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:03,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2946 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:00:03,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-19 14:00:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2021-11-19 14:00:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 490 states have (on average 1.6489795918367347) internal successors, (808), 507 states have internal predecessors, (808), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (107), 103 states have call predecessors, (107), 105 states have call successors, (107) [2021-11-19 14:00:03,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1023 transitions. [2021-11-19 14:00:03,500 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1023 transitions. Word has length 134 [2021-11-19 14:00:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:03,500 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1023 transitions. [2021-11-19 14:00:03,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:00:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1023 transitions. [2021-11-19 14:00:03,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:00:03,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:03,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:03,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:03,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:03,723 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash 514553011, now seen corresponding path program 1 times [2021-11-19 14:00:03,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:03,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994077778] [2021-11-19 14:00:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:03,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:03,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:03,726 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:03,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:00:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:04,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:00:04,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:00:04,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:00:04,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:04,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994077778] [2021-11-19 14:00:04,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994077778] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:04,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:04,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:00:04,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619005232] [2021-11-19 14:00:04,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:04,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:00:04,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:04,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:00:04,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:00:04,838 INFO L87 Difference]: Start difference. First operand 628 states and 1023 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:05,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:05,130 INFO L93 Difference]: Finished difference Result 1250 states and 2044 transitions. [2021-11-19 14:00:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:00:05,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 136 [2021-11-19 14:00:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:05,137 INFO L225 Difference]: With dead ends: 1250 [2021-11-19 14:00:05,138 INFO L226 Difference]: Without dead ends: 637 [2021-11-19 14:00:05,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:00:05,143 INFO L933 BasicCegarLoop]: 998 mSDtfsCounter, 104 mSDsluCounter, 4855 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5853 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:05,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5853 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:00:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-19 14:00:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 628. [2021-11-19 14:00:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 490 states have (on average 1.6489795918367347) internal successors, (808), 507 states have internal predecessors, (808), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (107), 103 states have call predecessors, (107), 105 states have call successors, (107) [2021-11-19 14:00:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1023 transitions. [2021-11-19 14:00:05,193 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1023 transitions. Word has length 136 [2021-11-19 14:00:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:05,194 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1023 transitions. [2021-11-19 14:00:05,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:05,194 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1023 transitions. [2021-11-19 14:00:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 14:00:05,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:05,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:05,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:05,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:05,415 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:05,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:05,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1368453772, now seen corresponding path program 1 times [2021-11-19 14:00:05,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:05,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394623428] [2021-11-19 14:00:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:05,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:05,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:05,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:05,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:00:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:05,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:05,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:00:06,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:00:06,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:06,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394623428] [2021-11-19 14:00:06,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394623428] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:06,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:06,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:00:06,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802115277] [2021-11-19 14:00:06,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:06,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:06,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:06,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:06,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:06,375 INFO L87 Difference]: Start difference. First operand 628 states and 1023 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:00:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:06,651 INFO L93 Difference]: Finished difference Result 1270 states and 2082 transitions. [2021-11-19 14:00:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:00:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 137 [2021-11-19 14:00:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:06,668 INFO L225 Difference]: With dead ends: 1270 [2021-11-19 14:00:06,668 INFO L226 Difference]: Without dead ends: 657 [2021-11-19 14:00:06,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:06,680 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 112 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:06,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2790 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:00:06,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-11-19 14:00:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 648. [2021-11-19 14:00:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 509 states have (on average 1.6444007858546168) internal successors, (837), 526 states have internal predecessors, (837), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2021-11-19 14:00:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1051 transitions. [2021-11-19 14:00:06,717 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1051 transitions. Word has length 137 [2021-11-19 14:00:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:06,717 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1051 transitions. [2021-11-19 14:00:06,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:00:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1051 transitions. [2021-11-19 14:00:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 14:00:06,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:06,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:06,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-19 14:00:06,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:06,947 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:06,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:06,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1896158791, now seen corresponding path program 1 times [2021-11-19 14:00:06,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:06,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309566877] [2021-11-19 14:00:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:06,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:06,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:06,949 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:06,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:00:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:07,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:00:07,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:00:07,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:00:07,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:07,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309566877] [2021-11-19 14:00:07,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309566877] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:07,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:07,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 14:00:07,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689090732] [2021-11-19 14:00:07,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:07,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:00:07,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:07,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:00:07,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:00:07,944 INFO L87 Difference]: Start difference. First operand 648 states and 1051 transitions. Second operand has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:08,194 INFO L93 Difference]: Finished difference Result 1299 states and 2113 transitions. [2021-11-19 14:00:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:00:08,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 138 [2021-11-19 14:00:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:08,202 INFO L225 Difference]: With dead ends: 1299 [2021-11-19 14:00:08,202 INFO L226 Difference]: Without dead ends: 666 [2021-11-19 14:00:08,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:00:08,208 INFO L933 BasicCegarLoop]: 986 mSDtfsCounter, 154 mSDsluCounter, 4783 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5769 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:08,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5769 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:00:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-11-19 14:00:08,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 648. [2021-11-19 14:00:08,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 509 states have (on average 1.6444007858546168) internal successors, (837), 526 states have internal predecessors, (837), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2021-11-19 14:00:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1051 transitions. [2021-11-19 14:00:08,254 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1051 transitions. Word has length 138 [2021-11-19 14:00:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:08,254 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1051 transitions. [2021-11-19 14:00:08,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1051 transitions. [2021-11-19 14:00:08,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:00:08,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:08,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:08,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:08,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:08,485 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:08,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1445422846, now seen corresponding path program 1 times [2021-11-19 14:00:08,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:08,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137167100] [2021-11-19 14:00:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:08,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:08,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:08,487 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:08,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:00:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:08,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:00:08,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:00:09,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:00:09,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:09,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137167100] [2021-11-19 14:00:09,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137167100] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:09,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:09,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:00:09,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122145284] [2021-11-19 14:00:09,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:09,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:00:09,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:09,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:00:09,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:00:09,600 INFO L87 Difference]: Start difference. First operand 648 states and 1051 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:09,929 INFO L93 Difference]: Finished difference Result 1294 states and 2104 transitions. [2021-11-19 14:00:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:00:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 139 [2021-11-19 14:00:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:09,937 INFO L225 Difference]: With dead ends: 1294 [2021-11-19 14:00:09,937 INFO L226 Difference]: Without dead ends: 661 [2021-11-19 14:00:09,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:00:09,943 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 112 mSDsluCounter, 5749 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6725 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:09,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6725 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:00:09,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-11-19 14:00:09,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 652. [2021-11-19 14:00:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 513 states have (on average 1.6393762183235867) internal successors, (841), 530 states have internal predecessors, (841), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2021-11-19 14:00:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1055 transitions. [2021-11-19 14:00:09,971 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1055 transitions. Word has length 139 [2021-11-19 14:00:09,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:09,971 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1055 transitions. [2021-11-19 14:00:09,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1055 transitions. [2021-11-19 14:00:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 14:00:09,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:09,977 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:09,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:10,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:10,195 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:10,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:10,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1615998809, now seen corresponding path program 1 times [2021-11-19 14:00:10,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:10,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462177177] [2021-11-19 14:00:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:10,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:10,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:10,197 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:10,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:00:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:10,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:00:10,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:00:10,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:00:11,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:11,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462177177] [2021-11-19 14:00:11,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462177177] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:11,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:11,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:00:11,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592476589] [2021-11-19 14:00:11,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:11,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:00:11,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:11,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:00:11,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:00:11,348 INFO L87 Difference]: Start difference. First operand 652 states and 1055 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:11,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:11,791 INFO L93 Difference]: Finished difference Result 1304 states and 2116 transitions. [2021-11-19 14:00:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:00:11,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 140 [2021-11-19 14:00:11,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:11,801 INFO L225 Difference]: With dead ends: 1304 [2021-11-19 14:00:11,802 INFO L226 Difference]: Without dead ends: 667 [2021-11-19 14:00:11,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:00:11,809 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 108 mSDsluCounter, 5755 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6733 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:11,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6733 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:00:11,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-19 14:00:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 658. [2021-11-19 14:00:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 519 states have (on average 1.6319845857418112) internal successors, (847), 536 states have internal predecessors, (847), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2021-11-19 14:00:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1061 transitions. [2021-11-19 14:00:11,840 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1061 transitions. Word has length 140 [2021-11-19 14:00:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:11,841 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1061 transitions. [2021-11-19 14:00:11,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1061 transitions. [2021-11-19 14:00:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 14:00:11,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:11,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:11,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:12,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:12,064 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:12,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:12,064 INFO L85 PathProgramCache]: Analyzing trace with hash -714913799, now seen corresponding path program 1 times [2021-11-19 14:00:12,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:12,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311936137] [2021-11-19 14:00:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:12,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:12,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:12,066 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:12,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:00:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:12,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:00:12,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:00:12,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:00:13,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:13,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311936137] [2021-11-19 14:00:13,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311936137] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:13,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:13,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:00:13,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133167266] [2021-11-19 14:00:13,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:13,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:00:13,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:13,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:00:13,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:00:13,180 INFO L87 Difference]: Start difference. First operand 658 states and 1061 transitions. Second operand has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:13,602 INFO L93 Difference]: Finished difference Result 1318 states and 2132 transitions. [2021-11-19 14:00:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:00:13,604 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 141 [2021-11-19 14:00:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:13,610 INFO L225 Difference]: With dead ends: 1318 [2021-11-19 14:00:13,610 INFO L226 Difference]: Without dead ends: 675 [2021-11-19 14:00:13,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:00:13,616 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 108 mSDsluCounter, 5755 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6733 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:13,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6733 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:00:13,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-11-19 14:00:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 666. [2021-11-19 14:00:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 527 states have (on average 1.6223908918406071) internal successors, (855), 544 states have internal predecessors, (855), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2021-11-19 14:00:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1069 transitions. [2021-11-19 14:00:13,653 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1069 transitions. Word has length 141 [2021-11-19 14:00:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:13,654 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1069 transitions. [2021-11-19 14:00:13,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1069 transitions. [2021-11-19 14:00:13,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 14:00:13,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:13,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:13,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:13,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:13,879 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:13,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1530173758, now seen corresponding path program 1 times [2021-11-19 14:00:13,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:13,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647152409] [2021-11-19 14:00:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:13,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:13,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:13,881 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:13,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:00:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:14,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:00:14,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:00:14,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:00:14,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:14,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647152409] [2021-11-19 14:00:14,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647152409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:14,902 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:14,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:00:14,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504190326] [2021-11-19 14:00:14,903 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:14,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:00:14,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:14,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:00:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:00:14,905 INFO L87 Difference]: Start difference. First operand 666 states and 1069 transitions. Second operand has 11 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 4 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 14:00:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:15,263 INFO L93 Difference]: Finished difference Result 1257 states and 2016 transitions. [2021-11-19 14:00:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:00:15,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 4 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 142 [2021-11-19 14:00:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:15,277 INFO L225 Difference]: With dead ends: 1257 [2021-11-19 14:00:15,277 INFO L226 Difference]: Without dead ends: 684 [2021-11-19 14:00:15,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:00:15,283 INFO L933 BasicCegarLoop]: 986 mSDtfsCounter, 100 mSDsluCounter, 6726 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 7712 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:15,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 7712 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:00:15,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-11-19 14:00:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 673. [2021-11-19 14:00:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 531 states have (on average 1.6177024482109228) internal successors, (859), 550 states have internal predecessors, (859), 109 states have call successors, (109), 31 states have call predecessors, (109), 32 states have return successors, (110), 104 states have call predecessors, (110), 106 states have call successors, (110) [2021-11-19 14:00:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1078 transitions. [2021-11-19 14:00:15,321 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1078 transitions. Word has length 142 [2021-11-19 14:00:15,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:15,322 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 1078 transitions. [2021-11-19 14:00:15,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 4 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 14:00:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1078 transitions. [2021-11-19 14:00:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-19 14:00:15,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:15,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:15,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:15,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:15,543 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:15,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1538991532, now seen corresponding path program 1 times [2021-11-19 14:00:15,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:15,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715788948] [2021-11-19 14:00:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:15,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:15,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:15,545 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:15,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:00:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:15,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:00:15,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:00:16,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:00:16,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:16,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715788948] [2021-11-19 14:00:16,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715788948] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:16,587 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:16,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:00:16,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65053112] [2021-11-19 14:00:16,588 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:16,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:00:16,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:16,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:00:16,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:00:16,590 INFO L87 Difference]: Start difference. First operand 673 states and 1078 transitions. Second operand has 11 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 14:00:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:16,867 INFO L93 Difference]: Finished difference Result 1260 states and 2019 transitions. [2021-11-19 14:00:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:00:16,869 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 144 [2021-11-19 14:00:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:16,875 INFO L225 Difference]: With dead ends: 1260 [2021-11-19 14:00:16,875 INFO L226 Difference]: Without dead ends: 687 [2021-11-19 14:00:16,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:00:16,879 INFO L933 BasicCegarLoop]: 988 mSDtfsCounter, 181 mSDsluCounter, 3927 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 4915 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:16,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 4915 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:00:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-11-19 14:00:16,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 680. [2021-11-19 14:00:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 535 states have (on average 1.6130841121495327) internal successors, (863), 556 states have internal predecessors, (863), 110 states have call successors, (110), 31 states have call predecessors, (110), 34 states have return successors, (114), 105 states have call predecessors, (114), 107 states have call successors, (114) [2021-11-19 14:00:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1087 transitions. [2021-11-19 14:00:16,910 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1087 transitions. Word has length 144 [2021-11-19 14:00:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:16,910 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 1087 transitions. [2021-11-19 14:00:16,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 14:00:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1087 transitions. [2021-11-19 14:00:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-19 14:00:16,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:16,917 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:16,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:17,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:17,138 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:17,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:17,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1039980216, now seen corresponding path program 1 times [2021-11-19 14:00:17,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:17,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907003201] [2021-11-19 14:00:17,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:17,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:17,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:17,141 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:17,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:00:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:17,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:00:17,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:00:17,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:00:18,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:18,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907003201] [2021-11-19 14:00:18,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907003201] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:18,097 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:18,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:00:18,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025438089] [2021-11-19 14:00:18,097 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:18,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:00:18,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:18,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:00:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:00:18,099 INFO L87 Difference]: Start difference. First operand 680 states and 1087 transitions. Second operand has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-19 14:00:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:18,325 INFO L93 Difference]: Finished difference Result 1261 states and 2020 transitions. [2021-11-19 14:00:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:00:18,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 144 [2021-11-19 14:00:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:18,332 INFO L225 Difference]: With dead ends: 1261 [2021-11-19 14:00:18,332 INFO L226 Difference]: Without dead ends: 688 [2021-11-19 14:00:18,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:00:18,337 INFO L933 BasicCegarLoop]: 990 mSDtfsCounter, 230 mSDsluCounter, 3889 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 4879 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:18,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 4879 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:00:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-11-19 14:00:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 683. [2021-11-19 14:00:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 537 states have (on average 1.6108007448789572) internal successors, (865), 559 states have internal predecessors, (865), 110 states have call successors, (110), 31 states have call predecessors, (110), 35 states have return successors, (115), 105 states have call predecessors, (115), 107 states have call successors, (115) [2021-11-19 14:00:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1090 transitions. [2021-11-19 14:00:18,368 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1090 transitions. Word has length 144 [2021-11-19 14:00:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:18,368 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 1090 transitions. [2021-11-19 14:00:18,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-19 14:00:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1090 transitions. [2021-11-19 14:00:18,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-19 14:00:18,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:18,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:18,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:18,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:18,597 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash -525487386, now seen corresponding path program 1 times [2021-11-19 14:00:18,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:18,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801141028] [2021-11-19 14:00:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:18,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:18,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:18,600 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:18,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:00:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:18,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:18,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:00:19,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:00:19,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:19,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801141028] [2021-11-19 14:00:19,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801141028] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:19,503 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:19,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:00:19,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671466235] [2021-11-19 14:00:19,503 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:19,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:00:19,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:19,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:00:19,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:00:19,505 INFO L87 Difference]: Start difference. First operand 683 states and 1090 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:00:19,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:19,594 INFO L93 Difference]: Finished difference Result 1331 states and 2128 transitions. [2021-11-19 14:00:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:00:19,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 144 [2021-11-19 14:00:19,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:19,601 INFO L225 Difference]: With dead ends: 1331 [2021-11-19 14:00:19,601 INFO L226 Difference]: Without dead ends: 633 [2021-11-19 14:00:19,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:19,606 INFO L933 BasicCegarLoop]: 984 mSDtfsCounter, 23 mSDsluCounter, 2941 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3925 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:19,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 3925 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:00:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-19 14:00:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2021-11-19 14:00:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 494 states have (on average 1.5931174089068827) internal successors, (787), 511 states have internal predecessors, (787), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 14:00:19,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1000 transitions. [2021-11-19 14:00:19,656 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1000 transitions. Word has length 144 [2021-11-19 14:00:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:19,657 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1000 transitions. [2021-11-19 14:00:19,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:00:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1000 transitions. [2021-11-19 14:00:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 14:00:19,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:19,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:19,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:19,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:19,879 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:19,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:19,880 INFO L85 PathProgramCache]: Analyzing trace with hash 583304491, now seen corresponding path program 1 times [2021-11-19 14:00:19,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:19,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128556758] [2021-11-19 14:00:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:19,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:19,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:19,883 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:19,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:00:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:20,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:20,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:00:20,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:00:20,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:20,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128556758] [2021-11-19 14:00:20,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128556758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:20,881 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:20,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:00:20,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101554530] [2021-11-19 14:00:20,881 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:20,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:00:20,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:00:20,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:20,883 INFO L87 Difference]: Start difference. First operand 633 states and 1000 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:00:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:21,067 INFO L93 Difference]: Finished difference Result 1292 states and 2033 transitions. [2021-11-19 14:00:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:00:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 146 [2021-11-19 14:00:21,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:21,074 INFO L225 Difference]: With dead ends: 1292 [2021-11-19 14:00:21,074 INFO L226 Difference]: Without dead ends: 630 [2021-11-19 14:00:21,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:00:21,079 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 120 mSDsluCounter, 3656 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 4585 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:21,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 4585 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-19 14:00:21,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 630. [2021-11-19 14:00:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 491 states have (on average 1.5723014256619146) internal successors, (772), 507 states have internal predecessors, (772), 108 states have call successors, (108), 32 states have call predecessors, (108), 30 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 14:00:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 985 transitions. [2021-11-19 14:00:21,105 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 985 transitions. Word has length 146 [2021-11-19 14:00:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:21,106 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 985 transitions. [2021-11-19 14:00:21,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:00:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 985 transitions. [2021-11-19 14:00:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 14:00:21,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:21,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:21,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:21,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:21,335 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:21,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:21,335 INFO L85 PathProgramCache]: Analyzing trace with hash 357096288, now seen corresponding path program 1 times [2021-11-19 14:00:21,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:21,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845941355] [2021-11-19 14:00:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:21,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:21,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:21,337 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:21,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:00:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:21,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:00:21,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:00:21,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:00:22,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:22,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845941355] [2021-11-19 14:00:22,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845941355] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:22,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:22,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:00:22,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976307358] [2021-11-19 14:00:22,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:22,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:00:22,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:22,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:00:22,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:00:22,381 INFO L87 Difference]: Start difference. First operand 630 states and 985 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:00:23,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:23,329 INFO L93 Difference]: Finished difference Result 1203 states and 1936 transitions. [2021-11-19 14:00:23,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:00:23,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 147 [2021-11-19 14:00:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:23,336 INFO L225 Difference]: With dead ends: 1203 [2021-11-19 14:00:23,336 INFO L226 Difference]: Without dead ends: 634 [2021-11-19 14:00:23,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:23,341 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 869 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 2342 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:23,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 2342 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:00:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-19 14:00:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2021-11-19 14:00:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 494 states have (on average 1.5688259109311742) internal successors, (775), 510 states have internal predecessors, (775), 108 states have call successors, (108), 33 states have call predecessors, (108), 31 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2021-11-19 14:00:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 989 transitions. [2021-11-19 14:00:23,372 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 989 transitions. Word has length 147 [2021-11-19 14:00:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:23,372 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 989 transitions. [2021-11-19 14:00:23,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:00:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 989 transitions. [2021-11-19 14:00:23,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 14:00:23,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:23,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:23,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:23,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:23,594 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:23,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1888593486, now seen corresponding path program 1 times [2021-11-19 14:00:23,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:23,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490412413] [2021-11-19 14:00:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:23,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:23,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:23,596 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:23,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:00:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:23,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:00:23,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:00:24,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:00:24,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:24,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490412413] [2021-11-19 14:00:24,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490412413] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:24,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:24,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:00:24,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425674136] [2021-11-19 14:00:24,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:24,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:00:24,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:24,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:00:24,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:00:24,645 INFO L87 Difference]: Start difference. First operand 634 states and 989 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:00:25,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:25,571 INFO L93 Difference]: Finished difference Result 1212 states and 1943 transitions. [2021-11-19 14:00:25,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:00:25,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 149 [2021-11-19 14:00:25,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:25,577 INFO L225 Difference]: With dead ends: 1212 [2021-11-19 14:00:25,577 INFO L226 Difference]: Without dead ends: 639 [2021-11-19 14:00:25,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:25,582 INFO L933 BasicCegarLoop]: 914 mSDtfsCounter, 866 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 2343 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:25,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 2343 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:00:25,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-11-19 14:00:25,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2021-11-19 14:00:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 498 states have (on average 1.5642570281124497) internal successors, (779), 514 states have internal predecessors, (779), 108 states have call successors, (108), 34 states have call predecessors, (108), 32 states have return successors, (107), 103 states have call predecessors, (107), 105 states have call successors, (107) [2021-11-19 14:00:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 994 transitions. [2021-11-19 14:00:25,614 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 994 transitions. Word has length 149 [2021-11-19 14:00:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:25,614 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 994 transitions. [2021-11-19 14:00:25,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:00:25,615 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 994 transitions. [2021-11-19 14:00:25,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 14:00:25,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:25,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:25,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:25,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:25,836 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:25,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:25,837 INFO L85 PathProgramCache]: Analyzing trace with hash 240224608, now seen corresponding path program 1 times [2021-11-19 14:00:25,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:25,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178654016] [2021-11-19 14:00:25,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:25,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:25,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:25,839 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:25,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:00:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:26,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:00:26,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:00:26,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:00:26,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:26,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178654016] [2021-11-19 14:00:26,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178654016] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:26,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:26,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:00:26,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079799264] [2021-11-19 14:00:26,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:26,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:00:26,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:00:26,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:00:26,889 INFO L87 Difference]: Start difference. First operand 639 states and 994 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:00:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:27,741 INFO L93 Difference]: Finished difference Result 1223 states and 1952 transitions. [2021-11-19 14:00:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:00:27,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 151 [2021-11-19 14:00:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:27,746 INFO L225 Difference]: With dead ends: 1223 [2021-11-19 14:00:27,746 INFO L226 Difference]: Without dead ends: 645 [2021-11-19 14:00:27,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:27,750 INFO L933 BasicCegarLoop]: 914 mSDtfsCounter, 870 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 2343 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:27,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 2343 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:00:27,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-11-19 14:00:27,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2021-11-19 14:00:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 503 states have (on average 1.5586481113320079) internal successors, (784), 519 states have internal predecessors, (784), 108 states have call successors, (108), 35 states have call predecessors, (108), 33 states have return successors, (108), 103 states have call predecessors, (108), 105 states have call successors, (108) [2021-11-19 14:00:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1000 transitions. [2021-11-19 14:00:27,799 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1000 transitions. Word has length 151 [2021-11-19 14:00:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:27,800 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1000 transitions. [2021-11-19 14:00:27,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:00:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1000 transitions. [2021-11-19 14:00:27,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 14:00:27,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:27,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:27,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:28,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:28,019 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:28,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:28,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1037960106, now seen corresponding path program 1 times [2021-11-19 14:00:28,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:28,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659302180] [2021-11-19 14:00:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:28,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:28,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:28,021 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:28,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:00:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:28,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:00:28,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:00:28,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:00:29,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:29,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659302180] [2021-11-19 14:00:29,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659302180] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:29,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:29,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:00:29,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034592583] [2021-11-19 14:00:29,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:29,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:00:29,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:29,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:00:29,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:00:29,032 INFO L87 Difference]: Start difference. First operand 645 states and 1000 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:00:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:29,843 INFO L93 Difference]: Finished difference Result 1236 states and 1963 transitions. [2021-11-19 14:00:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:00:29,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 153 [2021-11-19 14:00:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:29,847 INFO L225 Difference]: With dead ends: 1236 [2021-11-19 14:00:29,847 INFO L226 Difference]: Without dead ends: 652 [2021-11-19 14:00:29,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:29,851 INFO L933 BasicCegarLoop]: 914 mSDtfsCounter, 868 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 2343 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:29,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 2343 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:00:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-11-19 14:00:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 652. [2021-11-19 14:00:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 509 states have (on average 1.5520628683693516) internal successors, (790), 525 states have internal predecessors, (790), 108 states have call successors, (108), 36 states have call predecessors, (108), 34 states have return successors, (109), 103 states have call predecessors, (109), 105 states have call successors, (109) [2021-11-19 14:00:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1007 transitions. [2021-11-19 14:00:29,881 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1007 transitions. Word has length 153 [2021-11-19 14:00:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:29,882 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1007 transitions. [2021-11-19 14:00:29,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:00:29,882 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1007 transitions. [2021-11-19 14:00:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-19 14:00:29,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:29,886 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:29,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:30,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:30,107 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:30,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:30,108 INFO L85 PathProgramCache]: Analyzing trace with hash -141981344, now seen corresponding path program 1 times [2021-11-19 14:00:30,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:30,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96882664] [2021-11-19 14:00:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:30,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:30,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:30,110 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:30,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:00:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:30,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:00:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:00:30,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:00:31,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:31,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96882664] [2021-11-19 14:00:31,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96882664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:31,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1409372743] [2021-11-19 14:00:31,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:31,467 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:31,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:00:31,472 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:00:31,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-19 14:00:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:31,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:00:31,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:00:32,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 14:00:32,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1409372743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:32,471 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:00:32,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [9, 9] total 14 [2021-11-19 14:00:32,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543180905] [2021-11-19 14:00:32,471 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:32,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:00:32,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:32,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:00:32,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:00:32,473 INFO L87 Difference]: Start difference. First operand 652 states and 1007 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 14:00:32,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:32,514 INFO L93 Difference]: Finished difference Result 1471 states and 2276 transitions. [2021-11-19 14:00:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:32,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 155 [2021-11-19 14:00:32,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:32,522 INFO L225 Difference]: With dead ends: 1471 [2021-11-19 14:00:32,522 INFO L226 Difference]: Without dead ends: 880 [2021-11-19 14:00:32,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:00:32,528 INFO L933 BasicCegarLoop]: 1144 mSDtfsCounter, 627 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:32,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 1667 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:00:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-19 14:00:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 876. [2021-11-19 14:00:32,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 687 states have (on average 1.5109170305676856) internal successors, (1038), 701 states have internal predecessors, (1038), 138 states have call successors, (138), 53 states have call predecessors, (138), 50 states have return successors, (151), 133 states have call predecessors, (151), 134 states have call successors, (151) [2021-11-19 14:00:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1327 transitions. [2021-11-19 14:00:32,576 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1327 transitions. Word has length 155 [2021-11-19 14:00:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:32,577 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1327 transitions. [2021-11-19 14:00:32,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 14:00:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1327 transitions. [2021-11-19 14:00:32,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-19 14:00:32,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:32,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:32,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:32,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:32,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:32,993 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:32,994 INFO L85 PathProgramCache]: Analyzing trace with hash -87588446, now seen corresponding path program 1 times [2021-11-19 14:00:32,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:32,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251241008] [2021-11-19 14:00:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:32,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:32,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:32,996 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:32,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:00:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:33,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:00:33,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:00:33,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:00:34,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:34,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251241008] [2021-11-19 14:00:34,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251241008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:34,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1969928372] [2021-11-19 14:00:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:34,322 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:34,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:00:34,323 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:00:34,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 14:00:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:34,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:00:34,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:00:34,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:00:35,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1969928372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:35,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250333674] [2021-11-19 14:00:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:35,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:35,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:35,560 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:00:35,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 14:00:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:35,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:00:35,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:00:36,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:00:36,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250333674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:36,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:00:36,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 13 [2021-11-19 14:00:36,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932863248] [2021-11-19 14:00:36,696 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:00:36,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:00:36,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:36,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:00:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:00:36,699 INFO L87 Difference]: Start difference. First operand 876 states and 1327 transitions. Second operand has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 10 states have internal predecessors, (160), 5 states have call successors, (35), 5 states have call predecessors, (35), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) [2021-11-19 14:00:47,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:47,871 INFO L93 Difference]: Finished difference Result 2924 states and 4584 transitions. [2021-11-19 14:00:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:00:47,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 10 states have internal predecessors, (160), 5 states have call successors, (35), 5 states have call predecessors, (35), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) Word has length 155 [2021-11-19 14:00:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:47,890 INFO L225 Difference]: With dead ends: 2924 [2021-11-19 14:00:47,890 INFO L226 Difference]: Without dead ends: 2109 [2021-11-19 14:00:47,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 916 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-11-19 14:00:47,897 INFO L933 BasicCegarLoop]: 1608 mSDtfsCounter, 2607 mSDsluCounter, 4750 mSDsCounter, 0 mSdLazyCounter, 10454 mSolverCounterSat, 990 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2726 SdHoareTripleChecker+Valid, 6358 SdHoareTripleChecker+Invalid, 11444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 990 IncrementalHoareTripleChecker+Valid, 10454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:47,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2726 Valid, 6358 Invalid, 11444 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [990 Valid, 10454 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-11-19 14:00:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-11-19 14:00:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1801. [2021-11-19 14:00:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1391 states have (on average 1.5132997843278218) internal successors, (2105), 1426 states have internal predecessors, (2105), 303 states have call successors, (303), 103 states have call predecessors, (303), 106 states have return successors, (357), 300 states have call predecessors, (357), 297 states have call successors, (357) [2021-11-19 14:00:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2765 transitions. [2021-11-19 14:00:48,017 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2765 transitions. Word has length 155 [2021-11-19 14:00:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:48,018 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 2765 transitions. [2021-11-19 14:00:48,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 10 states have internal predecessors, (160), 5 states have call successors, (35), 5 states have call predecessors, (35), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) [2021-11-19 14:00:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2765 transitions. [2021-11-19 14:00:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:00:48,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:48,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:48,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:48,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:48,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-19 14:00:48,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:48,641 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:48,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:48,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1789148336, now seen corresponding path program 1 times [2021-11-19 14:00:48,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:48,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177283501] [2021-11-19 14:00:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:48,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:48,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:48,643 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:48,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:00:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:48,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:00:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:00:49,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:00:49,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:49,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177283501] [2021-11-19 14:00:49,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177283501] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:49,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:49,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2021-11-19 14:00:49,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107331277] [2021-11-19 14:00:49,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:49,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:00:49,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:49,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:00:49,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:49,736 INFO L87 Difference]: Start difference. First operand 1801 states and 2765 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:50,037 INFO L93 Difference]: Finished difference Result 3471 states and 5367 transitions. [2021-11-19 14:00:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:00:50,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 156 [2021-11-19 14:00:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:50,054 INFO L225 Difference]: With dead ends: 3471 [2021-11-19 14:00:50,054 INFO L226 Difference]: Without dead ends: 1697 [2021-11-19 14:00:50,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:00:50,064 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 62 mSDsluCounter, 5472 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6393 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:50,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 6393 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:00:50,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2021-11-19 14:00:50,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1691. [2021-11-19 14:00:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1305 states have (on average 1.5333333333333334) internal successors, (2001), 1339 states have internal predecessors, (2001), 289 states have call successors, (289), 94 states have call predecessors, (289), 96 states have return successors, (328), 286 states have call predecessors, (328), 283 states have call successors, (328) [2021-11-19 14:00:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2618 transitions. [2021-11-19 14:00:50,156 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2618 transitions. Word has length 156 [2021-11-19 14:00:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:50,156 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 2618 transitions. [2021-11-19 14:00:50,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:00:50,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2618 transitions. [2021-11-19 14:00:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-19 14:00:50,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:50,161 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:50,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:50,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:50,375 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:50,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:50,375 INFO L85 PathProgramCache]: Analyzing trace with hash -713595670, now seen corresponding path program 1 times [2021-11-19 14:00:50,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:50,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707996458] [2021-11-19 14:00:50,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:50,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:50,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:50,377 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:50,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:00:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:50,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:00:50,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:00:51,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 14:00:51,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:51,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707996458] [2021-11-19 14:00:51,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707996458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:51,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1549165261] [2021-11-19 14:00:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:51,778 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:51,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:00:51,779 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:00:51,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-19 14:00:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:52,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:00:52,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:00:52,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 14:00:53,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1549165261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:53,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925169267] [2021-11-19 14:00:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:53,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:53,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:53,057 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:00:53,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-19 14:00:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:53,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:00:53,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:00:53,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 14:00:54,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925169267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:54,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:00:54,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 8, 7, 8] total 12 [2021-11-19 14:00:54,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993009906] [2021-11-19 14:00:54,290 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:00:54,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:00:54,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:54,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:00:54,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:00:54,293 INFO L87 Difference]: Start difference. First operand 1691 states and 2618 transitions. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 10 states have internal predecessors, (171), 5 states have call successors, (37), 5 states have call predecessors, (37), 8 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-19 14:01:01,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:01,009 INFO L93 Difference]: Finished difference Result 4227 states and 6643 transitions. [2021-11-19 14:01:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:01:01,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 10 states have internal predecessors, (171), 5 states have call successors, (37), 5 states have call predecessors, (37), 8 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) Word has length 163 [2021-11-19 14:01:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:01,035 INFO L225 Difference]: With dead ends: 4227 [2021-11-19 14:01:01,036 INFO L226 Difference]: Without dead ends: 2596 [2021-11-19 14:01:01,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 965 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:01:01,047 INFO L933 BasicCegarLoop]: 1613 mSDtfsCounter, 2915 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 5855 mSolverCounterSat, 836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2950 SdHoareTripleChecker+Valid, 3921 SdHoareTripleChecker+Invalid, 6691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 5855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:01,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2950 Valid, 3921 Invalid, 6691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 5855 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-11-19 14:01:01,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-11-19 14:01:01,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 2513. [2021-11-19 14:01:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 1926 states have (on average 1.5384215991692627) internal successors, (2963), 1980 states have internal predecessors, (2963), 440 states have call successors, (440), 135 states have call predecessors, (440), 146 states have return successors, (521), 443 states have call predecessors, (521), 432 states have call successors, (521) [2021-11-19 14:01:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3924 transitions. [2021-11-19 14:01:01,261 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3924 transitions. Word has length 163 [2021-11-19 14:01:01,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:01,262 INFO L470 AbstractCegarLoop]: Abstraction has 2513 states and 3924 transitions. [2021-11-19 14:01:01,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 10 states have internal predecessors, (171), 5 states have call successors, (37), 5 states have call predecessors, (37), 8 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-19 14:01:01,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3924 transitions. [2021-11-19 14:01:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-19 14:01:01,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:01,273 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:01,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:01,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-19 14:01:01,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-19 14:01:01,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:01,877 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:01,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:01,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1733808099, now seen corresponding path program 1 times [2021-11-19 14:01:01,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:01,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340204945] [2021-11-19 14:01:01,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:01,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:01,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:01,881 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:01,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:01:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:02,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:01:02,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:01:02,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:01:03,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:03,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340204945] [2021-11-19 14:01:03,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340204945] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:01:03,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:01:03,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-19 14:01:03,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168058641] [2021-11-19 14:01:03,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:03,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:03,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:03,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:03,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:01:03,042 INFO L87 Difference]: Start difference. First operand 2513 states and 3924 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:01:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:04,164 INFO L93 Difference]: Finished difference Result 6795 states and 10727 transitions. [2021-11-19 14:01:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:01:04,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 164 [2021-11-19 14:01:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:04,198 INFO L225 Difference]: With dead ends: 6795 [2021-11-19 14:01:04,199 INFO L226 Difference]: Without dead ends: 4336 [2021-11-19 14:01:04,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:01:04,213 INFO L933 BasicCegarLoop]: 1168 mSDtfsCounter, 776 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 3216 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:04,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 3216 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:01:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-11-19 14:01:04,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 4309. [2021-11-19 14:01:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4309 states, 3276 states have (on average 1.5326617826617828) internal successors, (5021), 3383 states have internal predecessors, (5021), 780 states have call successors, (780), 240 states have call predecessors, (780), 252 states have return successors, (904), 777 states have call predecessors, (904), 769 states have call successors, (904) [2021-11-19 14:01:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4309 states to 4309 states and 6705 transitions. [2021-11-19 14:01:04,559 INFO L78 Accepts]: Start accepts. Automaton has 4309 states and 6705 transitions. Word has length 164 [2021-11-19 14:01:04,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:04,560 INFO L470 AbstractCegarLoop]: Abstraction has 4309 states and 6705 transitions. [2021-11-19 14:01:04,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:01:04,561 INFO L276 IsEmpty]: Start isEmpty. Operand 4309 states and 6705 transitions. [2021-11-19 14:01:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-19 14:01:04,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:04,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:04,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:04,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:04,779 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:04,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:04,779 INFO L85 PathProgramCache]: Analyzing trace with hash 521913898, now seen corresponding path program 1 times [2021-11-19 14:01:04,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:04,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041551679] [2021-11-19 14:01:04,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:04,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:04,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:04,781 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:04,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:01:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:05,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:01:05,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:01:05,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 14:01:07,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:07,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041551679] [2021-11-19 14:01:07,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041551679] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:07,920 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:07,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [] total 7 [2021-11-19 14:01:07,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368842169] [2021-11-19 14:01:07,920 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:07,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:01:07,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:07,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:01:07,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:01:07,922 INFO L87 Difference]: Start difference. First operand 4309 states and 6705 transitions. Second operand has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 5 states have call successors, (40), 4 states have call predecessors, (40), 4 states have return successors, (37), 5 states have call predecessors, (37), 5 states have call successors, (37) [2021-11-19 14:01:14,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:14,418 INFO L93 Difference]: Finished difference Result 16740 states and 26377 transitions. [2021-11-19 14:01:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:01:14,424 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 5 states have call successors, (40), 4 states have call predecessors, (40), 4 states have return successors, (37), 5 states have call predecessors, (37), 5 states have call successors, (37) Word has length 166 [2021-11-19 14:01:14,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:14,524 INFO L225 Difference]: With dead ends: 16740 [2021-11-19 14:01:14,524 INFO L226 Difference]: Without dead ends: 12491 [2021-11-19 14:01:14,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:01:14,548 INFO L933 BasicCegarLoop]: 1925 mSDtfsCounter, 2473 mSDsluCounter, 2868 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2479 SdHoareTripleChecker+Valid, 4793 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:14,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2479 Valid, 4793 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-19 14:01:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12491 states. [2021-11-19 14:01:15,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12491 to 11607. [2021-11-19 14:01:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11607 states, 9056 states have (on average 1.5415194346289753) internal successors, (13960), 9261 states have internal predecessors, (13960), 1860 states have call successors, (1860), 652 states have call predecessors, (1860), 690 states have return successors, (2366), 1785 states have call predecessors, (2366), 1831 states have call successors, (2366) [2021-11-19 14:01:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11607 states to 11607 states and 18186 transitions. [2021-11-19 14:01:15,488 INFO L78 Accepts]: Start accepts. Automaton has 11607 states and 18186 transitions. Word has length 166 [2021-11-19 14:01:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:15,491 INFO L470 AbstractCegarLoop]: Abstraction has 11607 states and 18186 transitions. [2021-11-19 14:01:15,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 5 states have call successors, (40), 4 states have call predecessors, (40), 4 states have return successors, (37), 5 states have call predecessors, (37), 5 states have call successors, (37) [2021-11-19 14:01:15,492 INFO L276 IsEmpty]: Start isEmpty. Operand 11607 states and 18186 transitions. [2021-11-19 14:01:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 14:01:15,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:15,498 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:15,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:15,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:15,718 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:15,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:15,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1654533438, now seen corresponding path program 1 times [2021-11-19 14:01:15,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:15,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979051276] [2021-11-19 14:01:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:15,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:15,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:15,721 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:15,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:01:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:16,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:01:16,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:01:16,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:01:17,005 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:17,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979051276] [2021-11-19 14:01:17,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979051276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:17,006 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:17,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 10 [2021-11-19 14:01:17,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111831989] [2021-11-19 14:01:17,006 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:17,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:01:17,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:17,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:01:17,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:01:17,008 INFO L87 Difference]: Start difference. First operand 11607 states and 18186 transitions. Second operand has 10 states, 10 states have (on average 18.1) internal successors, (181), 8 states have internal predecessors, (181), 3 states have call successors, (39), 3 states have call predecessors, (39), 6 states have return successors, (37), 5 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-19 14:01:20,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:20,408 INFO L93 Difference]: Finished difference Result 30747 states and 49400 transitions. [2021-11-19 14:01:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:01:20,410 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 8 states have internal predecessors, (181), 3 states have call successors, (39), 3 states have call predecessors, (39), 6 states have return successors, (37), 5 states have call predecessors, (37), 3 states have call successors, (37) Word has length 170 [2021-11-19 14:01:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:20,547 INFO L225 Difference]: With dead ends: 30747 [2021-11-19 14:01:20,547 INFO L226 Difference]: Without dead ends: 19164 [2021-11-19 14:01:20,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:01:20,630 INFO L933 BasicCegarLoop]: 1803 mSDtfsCounter, 3753 mSDsluCounter, 3504 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3757 SdHoareTripleChecker+Valid, 5307 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:20,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3757 Valid, 5307 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 14:01:20,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19164 states. [2021-11-19 14:01:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19164 to 19082. [2021-11-19 14:01:21,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19082 states, 14821 states have (on average 1.5279670737467108) internal successors, (22646), 15201 states have internal predecessors, (22646), 3098 states have call successors, (3098), 1050 states have call predecessors, (3098), 1162 states have return successors, (4272), 3014 states have call predecessors, (4272), 3051 states have call successors, (4272) [2021-11-19 14:01:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19082 states to 19082 states and 30016 transitions. [2021-11-19 14:01:21,945 INFO L78 Accepts]: Start accepts. Automaton has 19082 states and 30016 transitions. Word has length 170 [2021-11-19 14:01:21,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:21,946 INFO L470 AbstractCegarLoop]: Abstraction has 19082 states and 30016 transitions. [2021-11-19 14:01:21,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 8 states have internal predecessors, (181), 3 states have call successors, (39), 3 states have call predecessors, (39), 6 states have return successors, (37), 5 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-19 14:01:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 19082 states and 30016 transitions. [2021-11-19 14:01:21,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 14:01:21,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:21,952 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:21,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:22,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:22,167 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:22,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:22,167 INFO L85 PathProgramCache]: Analyzing trace with hash 687182784, now seen corresponding path program 1 times [2021-11-19 14:01:22,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:22,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77541882] [2021-11-19 14:01:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:22,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:22,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:22,169 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:22,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:01:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:22,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:01:22,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:01:23,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:01:23,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:23,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77541882] [2021-11-19 14:01:23,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77541882] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:01:23,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:01:23,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 16 [2021-11-19 14:01:23,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628598060] [2021-11-19 14:01:23,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:23,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:01:23,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:23,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:01:23,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:01:23,982 INFO L87 Difference]: Start difference. First operand 19082 states and 30016 transitions. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-19 14:01:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:28,175 INFO L93 Difference]: Finished difference Result 31911 states and 50145 transitions. [2021-11-19 14:01:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:01:28,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 170 [2021-11-19 14:01:28,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:28,444 INFO L225 Difference]: With dead ends: 31911 [2021-11-19 14:01:28,444 INFO L226 Difference]: Without dead ends: 18998 [2021-11-19 14:01:28,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 325 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:01:28,532 INFO L933 BasicCegarLoop]: 1708 mSDtfsCounter, 5658 mSDsluCounter, 3798 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 1385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5665 SdHoareTripleChecker+Valid, 5506 SdHoareTripleChecker+Invalid, 3235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1385 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:28,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5665 Valid, 5506 Invalid, 3235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1385 Valid, 1850 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 14:01:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18998 states. [2021-11-19 14:01:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18998 to 18994. [2021-11-19 14:01:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18994 states, 14769 states have (on average 1.5284717990385266) internal successors, (22574), 15149 states have internal predecessors, (22574), 3078 states have call successors, (3078), 1034 states have call predecessors, (3078), 1146 states have return successors, (4252), 2994 states have call predecessors, (4252), 3031 states have call successors, (4252) [2021-11-19 14:01:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18994 states to 18994 states and 29904 transitions. [2021-11-19 14:01:30,012 INFO L78 Accepts]: Start accepts. Automaton has 18994 states and 29904 transitions. Word has length 170 [2021-11-19 14:01:30,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:30,013 INFO L470 AbstractCegarLoop]: Abstraction has 18994 states and 29904 transitions. [2021-11-19 14:01:30,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-19 14:01:30,014 INFO L276 IsEmpty]: Start isEmpty. Operand 18994 states and 29904 transitions. [2021-11-19 14:01:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-19 14:01:30,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:30,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:30,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:30,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:30,244 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:30,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1421397859, now seen corresponding path program 1 times [2021-11-19 14:01:30,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:30,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679950014] [2021-11-19 14:01:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:30,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:30,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:30,248 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:30,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:01:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:30,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:30,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:01:31,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:01:31,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:31,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679950014] [2021-11-19 14:01:31,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679950014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:31,415 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:31,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 14:01:31,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688202475] [2021-11-19 14:01:31,415 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:31,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:31,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:31,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:31,417 INFO L87 Difference]: Start difference. First operand 18994 states and 29904 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-19 14:01:34,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:34,520 INFO L93 Difference]: Finished difference Result 52823 states and 86149 transitions. [2021-11-19 14:01:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:34,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 177 [2021-11-19 14:01:34,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:34,751 INFO L225 Difference]: With dead ends: 52823 [2021-11-19 14:01:34,752 INFO L226 Difference]: Without dead ends: 33865 [2021-11-19 14:01:34,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:34,956 INFO L933 BasicCegarLoop]: 1814 mSDtfsCounter, 1716 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 3200 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:34,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1716 Valid, 3200 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:01:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33865 states. [2021-11-19 14:01:36,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33865 to 33849. [2021-11-19 14:01:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33849 states, 26247 states have (on average 1.5181925553396578) internal successors, (39848), 26968 states have internal predecessors, (39848), 5556 states have call successors, (5556), 1830 states have call predecessors, (5556), 2045 states have return successors, (8471), 5418 states have call predecessors, (8471), 5473 states have call successors, (8471) [2021-11-19 14:01:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33849 states to 33849 states and 53875 transitions. [2021-11-19 14:01:37,491 INFO L78 Accepts]: Start accepts. Automaton has 33849 states and 53875 transitions. Word has length 177 [2021-11-19 14:01:37,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:37,492 INFO L470 AbstractCegarLoop]: Abstraction has 33849 states and 53875 transitions. [2021-11-19 14:01:37,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-19 14:01:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 33849 states and 53875 transitions. [2021-11-19 14:01:37,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-19 14:01:37,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:37,501 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:37,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:37,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:37,702 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:37,703 INFO L85 PathProgramCache]: Analyzing trace with hash 93365809, now seen corresponding path program 1 times [2021-11-19 14:01:37,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:37,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898623844] [2021-11-19 14:01:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:37,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:37,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:37,705 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:37,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 14:01:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:38,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:01:38,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:01:38,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:38,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898623844] [2021-11-19 14:01:38,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898623844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:38,912 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:38,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 14:01:38,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569304676] [2021-11-19 14:01:38,913 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:38,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:38,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:38,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:38,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:38,914 INFO L87 Difference]: Start difference. First operand 33849 states and 53875 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-19 14:01:44,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:44,489 INFO L93 Difference]: Finished difference Result 97520 states and 162770 transitions. [2021-11-19 14:01:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:44,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 178 [2021-11-19 14:01:44,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:44,944 INFO L225 Difference]: With dead ends: 97520 [2021-11-19 14:01:44,944 INFO L226 Difference]: Without dead ends: 63719 [2021-11-19 14:01:45,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:45,628 INFO L933 BasicCegarLoop]: 1823 mSDtfsCounter, 1724 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1724 SdHoareTripleChecker+Valid, 3216 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:45,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1724 Valid, 3216 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:01:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63719 states. [2021-11-19 14:01:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63719 to 63715. [2021-11-19 14:01:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63715 states, 49329 states have (on average 1.5082811328022057) internal successors, (74402), 50732 states have internal predecessors, (74402), 10530 states have call successors, (10530), 3434 states have call predecessors, (10530), 3855 states have return successors, (18307), 10284 states have call predecessors, (18307), 10375 states have call successors, (18307) [2021-11-19 14:01:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63715 states to 63715 states and 103239 transitions. [2021-11-19 14:01:51,321 INFO L78 Accepts]: Start accepts. Automaton has 63715 states and 103239 transitions. Word has length 178 [2021-11-19 14:01:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:51,321 INFO L470 AbstractCegarLoop]: Abstraction has 63715 states and 103239 transitions. [2021-11-19 14:01:51,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-19 14:01:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 63715 states and 103239 transitions. [2021-11-19 14:01:51,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 14:01:51,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:51,327 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:51,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-19 14:01:51,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:51,542 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:51,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:51,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1177384930, now seen corresponding path program 1 times [2021-11-19 14:01:51,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:51,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896534406] [2021-11-19 14:01:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:51,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:51,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:51,544 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:51,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37cafa8b-f8df-402b-a3d0-1963128df5d9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 14:01:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:51,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:51,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:01:52,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:01:52,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:52,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896534406] [2021-11-19 14:01:52,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896534406] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:52,707 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:52,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 14:01:52,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278895522] [2021-11-19 14:01:52,707 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:52,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:52,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:52,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:52,709 INFO L87 Difference]: Start difference. First operand 63715 states and 103239 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-19 14:02:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:04,365 INFO L93 Difference]: Finished difference Result 187262 states and 324076 transitions. [2021-11-19 14:02:04,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:02:04,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 179 [2021-11-19 14:02:04,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:05,488 INFO L225 Difference]: With dead ends: 187262 [2021-11-19 14:02:05,489 INFO L226 Difference]: Without dead ends: 123607 [2021-11-19 14:02:07,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:02:07,246 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 1732 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1732 SdHoareTripleChecker+Valid, 3232 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:07,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1732 Valid, 3232 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:02:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123607 states.